This is a 12A with a Nikki carb. I'm losing all the fuel from both front and rear fuel bowls within minutes of shutting the car off. At the same time, whenever I start the car, even a cold start, I have to press the pedal at least partway down, and on hot starts press it all the way down. So it's flooding. But I don't see the barrels filling up with fuel, and the bowls go halfway when it's running. How is fuel getting into the intake? The only thing I can think of is somehow through the idle port but why now?